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    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
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  <body>
    <script>
      let arr = [1, 2, 3, 4, 5, 6, 7];
      function inBetween(x, y) {
        return function (el) {
          return el >= x && el <= y;
        };
      }
      console.log(arr.filter(inBetween(3, 6))); // 3,4,5,6
      console.log(arr.filter(inBetween(2, 5))); // 3,4,5,6
      // console.log(arr.filter(inArray([1, 2, 10]))); // 1,2
    </script>
  </body>
</html>
